From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F09CAC433EF for ; Thu, 7 Apr 2022 14:04:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343806AbiDGOGL (ORCPT ); Thu, 7 Apr 2022 10:06:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245594AbiDGOGB (ORCPT ); Thu, 7 Apr 2022 10:06:01 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 48614E1252 for ; Thu, 7 Apr 2022 07:04:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1649340240; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=8dmlhw2gM3dighZKD1hw4c9m67LEmQRFc8UEGhxCeHA=; b=ABtSafK/E3WPndrRSRq5TIMQk5v7k+s81fUZfv8hukdPIA5bH+HX/677ZZUvyQv+Ee8hAr AQY2M4gyqhEVw6hvKU9bW2pQkUtz/ETU16+h8LNCX/CKfTzVfGpzQN5GsmtZFagaqv+7DH s3H/Ar+nSIrZTX30qQpxr8Eq5MHQ6V0= Received: from mail-qt1-f200.google.com (mail-qt1-f200.google.com [209.85.160.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-492-5ytghaBRN9yYNsoxVIk9QA-1; Thu, 07 Apr 2022 10:03:59 -0400 X-MC-Unique: 5ytghaBRN9yYNsoxVIk9QA-1 Received: by mail-qt1-f200.google.com with SMTP id k1-20020ac85fc1000000b002e1c5930386so5583093qta.3 for ; Thu, 07 Apr 2022 07:03:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=8dmlhw2gM3dighZKD1hw4c9m67LEmQRFc8UEGhxCeHA=; b=FohPMhfmHji8lwKpUI1nfrDOa6s/eK2dMhnlH8zWR2F+luQA8kOVNWJSHDa+pTGLbn Yrqy3FM8ZUBzuEWLfvmwAs3UHNetweIXDQxK52Q5LSi1K0tb7/o/hUleuVXWpHBqtOz+ hyQOwmn6o2Ph1q9WGV2m9lupQnh6W2npjl7xeNYPtm/T/foYVPP4/zMiQq6xbJWNQpQQ EF1hV+k5x1uICByBu9Qa0p9wCSBBkhKEwyZAEZhATMCmpkfNOZ8v+XYUV5Cp6HHGXCLu ETK7zAIJs1j9UTia7eH5YvWCTjMG9gfMcPvBziD6MyUyWqzTqTPRxnypQB2HKvbVCV8+ 5HOw== X-Gm-Message-State: AOAM532CxEyrgVF/M96rtXcvh4utNdlGKVtQOaQYST8gAl/YQlWXFCB6 EUri/wxxW6B0QhKA89CKWYrmcHxrcNwIExxHUBM2AMoTMyiHURxdd4lc12J56xpCg1Y4IGB9yVt 2Q95sKcGJ8IPQWCqbXC/sQzlF X-Received: by 2002:a05:620a:424e:b0:67e:4c1b:c214 with SMTP id w14-20020a05620a424e00b0067e4c1bc214mr9398815qko.651.1649340238616; Thu, 07 Apr 2022 07:03:58 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxeuhfUl7E5olUFie0FR1INlu5Q2ZTtT17yGQlnofo6l7qsijU3A/ijXWkDpwqeMJySvpGrYQ== X-Received: by 2002:a05:620a:424e:b0:67e:4c1b:c214 with SMTP id w14-20020a05620a424e00b0067e4c1bc214mr9398784qko.651.1649340238357; Thu, 07 Apr 2022 07:03:58 -0700 (PDT) Received: from fedora (modemcable200.11-22-96.mc.videotron.ca. [96.22.11.200]) by smtp.gmail.com with ESMTPSA id h6-20020ac85e06000000b002e1e8a98abbsm16006501qtx.41.2022.04.07.07.03.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Apr 2022 07:03:57 -0700 (PDT) Date: Thu, 7 Apr 2022 10:03:55 -0400 From: Adrien Thierry To: Stefan Wahren Cc: linux-kernel@vger.kernel.org, Rob Herring , Nicolas Saenz Julienne , Florian Fainelli , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman , Gaston Gonzalez , Ojaswin Mujoo , linux-staging@lists.linux.dev, Krzysztof Kozlowski Subject: Re: [PATCH v2 0/2] Add support for bcm2711 in vchiq_arm Message-ID: References: <20220324172647.167617-1-athierry@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Stefan, Thanks for your feedback. > Could you please explain your approach, especially leaving out 36 bit > DMA support? I realize I overlooked this 36 bit DMA support issue, I need to think it through a little bit more. > This is a really bad idea and caused a lot of trouble in the past. A lot > of the issues in the Fedora or Arch Linux forums or mailing lists > results from this idea. It wastes the time of the kernel developer since > these DT files has never been reviewed by the devicetree maintainers. I understand, thanks! I find the downstream dtbs convenient because of the overlay system that allows you to easily enable certain drivers, but I get your point. Best regards, Adrien